RU173117U1 - DEVICE FOR ISSUING A GAS-AIR MIXTURE FROM FORMS FOR HEAT-AND-HYDROINSULATION OF PRODUCTS ARE FOAMABLE BY CURING COMPOSITIONS - Google Patents

Abstract

The utility model relates to snap demountable forms used in the thermal insulation of products with foam-polymer composite materials. The device is made in the form of a cylindrical glass, the open end of which has a cylindrical protrusion on the outside. The bottom of the device and / or the cylindrical portion of the device protruding from the shape of the device has through holes. Through holes may have the form of slots. The size of the through holes and the width of the slots do not exceed 2 mm. The use of the device in demountable molds for the thermal insulation of products reduces the service time of casting molds, eliminates manual control of the release of the gas-air mixture, improves the quality of the molded products and reduces the loss of raw materials. 2 zp f-ly, 8 Fig.

Description

Technical field

The utility model relates to tooling of the forms used in the lines of thermal insulation of pipes and other products with foam-polymer composite materials (PPM).

State of the art

In lines or in installations for thermal insulation of pipes with foam polymer compositions in demountable forms, the air-gas mixture is released through openings made with a certain step on the upper leaf of the mold [A.S. No. 1566166 of the Russian Federation, IPC 16L 59/14. Form for applying thermal insulation to the pipe / Kotelenets V.N., Bulychev A.S., Krasovitsky A.S. and Shokhirev A.A .; All-Union State Research and Design Institute "Vnipienergoprom" ". - Application 4449265, Decl. 05/24/1988; Publ. 05/23/1990.] [1].

For example, for the release of gases from a closed form during pouring, there are openings in the cover — valves located along its length in steps of 200 mm along the upper generatrix [Patent 91132 of the Russian Federation, IPC F16L 59/14. Installation for the manufacture of foam insulation / M.E. Mishin, A.M. Misha LLC Scientific-Production Enterprise "Penopolimer" (RU). - Application 2009137267/22, Decl. 10/09/2009; Publ. January 27, 2010] [2].

The number and cross section of the holes are selected so that the entire volume of the gas-air mixture has time to get out of the casting mold and does not create obstacles for filling the entire working volume of the casting mold with the foaming composition.

These solutions have the following disadvantages:

- large losses of the polyurethane mixture during foaming when reaching the outlet. Losses increase with increasing temperature of the mold during production;

- increase in time spent on preparation (cleaning) of outlet openings in the production cycle of applying thermal insulation;

- due to the uncontrolled output (loss) of the polyurethane mixture during foaming, the density of the finished product has a significant spread.

There is a solution in which, for the complete release of the air-gas mixture, the foam-polymer composition is kept in the lower part of the mold until the reaction mixture is raised to 3/4 of its height, followed by closing the upper mold cover [RF Patent No. 21115059, IPC F16L 59/14. The method of thermal insulation of pipes based on foam-polymer compositions / Umerkin G.X., Bednyagin N.G., Tsibin Yu.I. Umerkin D.G. - 97119851/06; Claim 12/03/1997; Publ. 07/10/1998.] [3].

The disadvantage of this solution is the difficulty in determining the necessary moment for closing the mold, which provides spills, component loss or, conversely, incomplete foaming.

To reduce the losses of the mixture, some manufacturers install shut-off devices in the form of a cage with clips and balls placed between them at the outlet openings, which overlap the outlet openings. When foaming the reaction material, the springs open with the help of springs, thus the release of air and gases from the casting mold occurs [A.S. 1528997 SU, IPC F16L 59/14. The form for coating the pipe / Kotelenets V.N., Krasovitsky A.S., Izmailov M.I. and Shokhirev A.A .; All-Union State Research and Design Institute "Vnipienergoprom" ".- Application 3800492, Application. 10/12/1984; Publ. 12/15/1989.] [4].

The multi-part design of the above exhaust devices leads to an increase in the probability of device failure. So, getting foam inside the device is guaranteed to lead to jamming. Given the number of devices on the form for filling the pipe and the need for their constant maintenance, the known proposal is a difficult technical task.

The device of casting molds with a large number of outlet openings with their manual closure is inconvenient in operation and requires careful work of several people for timely closing of each outlet. With this solution, it is difficult to clean the outlet openings.

Utility Model Disclosure

The technical result of the solution proposed as a useful model is: reduction of time for servicing casting molds, refusal to manually control the release of the gas-air mixture, improving the quality of the molded products and reducing the loss of raw materials.

The technical result is achieved by the use of a replaceable device for the release of a gas-air mixture from casting molds for the production of products from expandable curable compositions.

The device is made in the form of a cylindrical glass, the open end of which has a cylindrical protrusion on the outside. The bottom of the device has through holes.

Through holes can be located on adjacent to the bottom protruding from the shape of the cylindrical part.

Through holes can be located on the bottom of the device and on the adjacent cylindrical part.

Through holes can be made in the form of slots.

The size of the through holes and the width of the slots does not exceed 2 mm.

For explanation and unambiguous understanding, drawings are attached to the description.

Brief Description of the Drawings

FIG. 1 is a longitudinal section of a device for discharging a gas-air mixture from casting molds, combined with the view. The device in the form of a cylindrical glass with through holes in the bottom is inserted into the outlet of the casting mold.

FIG. 2 is a view A-A (see Fig. 1) from above on a device for discharging a gas-air mixture located in an outlet of a casting mold.

FIG. 3 is a longitudinal section of a device for discharging a gas-air mixture from casting molds combined with a view. The device is made in the form of a cylindrical glass having through holes in the bottom and in the wall adjacent to the bottom.

FIG. 4 is a view A-A (FIG. 3), a top view of a device for discharging a gas-air mixture located in an outlet of a casting mold.

FIG. 5 is a longitudinal section of a device for discharging a gas-air mixture from casting molds, combined with a view, having the form of a cylindrical glass with through holes in a wall adjacent to the bottom of the device.

FIG. 6 is a view A-A (FIG. 5), top view of a device for discharging a gas-air mixture located in an outlet of a casting mold.

FIG. 7 is a cross-sectional view of a device for discharging a gas-air mixture from casting molds in the form of a cylindrical glass having L-shaped through slots. The device is inserted into the outlet of the casting mold.

FIG. 8 is a top view of BB on the device for discharging the air-gas mixture shown in FIG. 7.

The device 1 (Fig. 1 and Fig. 2) for discharging gases from the casting mold 2 is made in the form of a cylindrical glass or a hollow cylinder with one open end having an outer cylindrical protrusion 3 for fixing the device 1 in the wall opening of the casting mold 2. The device 1 has through holes 4, made only in the bottom of the cylindrical glass. The size of the holes does not exceed 2 mm.

The device 1 (Fig. 3 and Fig. 4) for discharging gases from the casting mold 2 is made in the form of a cylindrical cup, the open end of which has an outer cylindrical protrusion 3 for fixing the device 1 in the wall hole of the casting mold 2. The device 1 has through holes 4, made in the bottom and in the wall of the cylinder adjacent to the bottom. The holes 4 on the cylindrical part adjacent to the bottom of the device 1 are located mainly on the protruding part of the device 1. The size of the holes does not exceed 2 mm.

The device 1 (Fig. 5 and Fig. 6) for discharging gases from the casting mold 2 is made in the form of a cup, the open end of which has an external cylindrical protrusion 3 for fixing the device 1 in the wall hole of the casting mold 2. The device 1 has through holes 4 made in the cylinder wall adjacent to the bottom. The holes 4 are located on the protruding cylindrical part of the device 1. The size of the holes does not exceed 2 mm

Thus, the through holes 4 can be located on the bottom of the device 1 and / or on its cylindrical part adjacent to the bottom and protruding from the mold after they are installed during use.

The device 1 (Fig. 7 and Fig. 8) may have holes in the form of slots.

L-shaped through holes in the form of slots 4 'are made in the bottom and in the wall of the cylinder adjacent to the bottom. In FIG. 7 and FIG. 8 shows a device with four radial L-shaped slots. The number of slots 4 'may be larger or smaller, different, depending on the quality of the reaction mixture and the size of the outlet openings. The length of the slots 4 ′ in the wall of the device 1 is determined by the size of the part of the device 1 protruding above the mold surface. The width of the slots 4 ′ does not exceed 2 mm.

The outer diameter of the gas exchange device 1 is commensurate with the openings of the mold intended to discharge the gas-air mixture from the mold.

The operation of the device is as follows:

Before pouring the mold, devices 1 are inserted into the outlet openings in the upper part of the mold 2. After that, the mold is filled in with a foaming composition and closed.

When foaming, at the time of the final filling of the internal volume of the form, the polyurethane mixture is at the stage of completion of the primary polymerization processes, its viscosity increases. As the mold fills through the device, due to the sufficient flow area, the gas-air mixture freely passes, allowing the expandable composition to occupy the entire volume of the casting mold. When the composition reaches device 1, the reaction mixture, due to surface tension and the small size of the slots 4 'or holes 4 (not more than 2 mm) in the device 1, stops, stops at the slots of the device. After some time, due to the polymerization of the composition, the device is completely blocked for the mixture to pass through it.

After the polymerization processes are completed, the casting mold 2 is opened and the device 1 either remains in the manufactured insulated part or remains in the mounting hole in the mold. In the second case, the device is knocked out of the casting mold by a blow from the outside of the mold.

The proposed disposable device for discharging a gas mixture from a casting mold has the following advantages:

- reduced losses of the foaming mixture;

- reduced time spent on preparing holes for the exit of the gas mixture in the process;

- due to the minimal losses of the foamable mixture during molding, a stable quality is achieved due to the insulation density of the finished product;

- virtually eliminated from the production cycle, the operation of cleaning the holes provided in the forms for the exit of the gas mixture.

A disposable gas discharge device avoids manual control of the air-gas mixture.

The description given should not limit the present utility model to the drawings, which are merely private illustrations. The scope of this technical solution is determined only by the attached claims taking into account possible equivalents.

INFORMATION SOURCES

1. A.S. No. 1566166 of the Russian Federation, IPC 16L 59/14. Form for applying thermal insulation to the pipe / Kotelenets V.N., Bulychev A.S., Krasovitsky A.S. and Shokhirev A.A .; All-Union State Research and Design Institute "Vnipienergoprom" ". - Application 4449265, Decl. 05/24/1988; Publ. 05/23/1990.

2. Patent 91132 of the Russian Federation, IPC F16L 59/14. Installation for the manufacture of foam insulation / M.E. Mishin, A.M. Misha LLC Scientific-Production Enterprise "Penopolimer" (RU). - Application 2009137267/22, Decl. 10/09/2009; Publ. 01/27/2010

3. Patent No. 2115059 of the Russian Federation, IPC F16L 59/14. The method of thermal insulation of pipes based on foam-polymer compositions / Umerkin G.X., Bednyagin N.G., Tsibin Yu.I. Umerkin D.G. - 97119851/06; Claim 12/03/1997; Publ. 07/10/1998.

4. A.S. 1528997 SU, IPC F16L 59/14. The form for coating the pipe / Kotelenets V.N., Krasovitsky A.S., Izmailov M.I. and Shokhirev A.A .; All-Union State Research and Design Institute "Vnipienergoprom". - Application 3800492, Decl. 10/12/1984; Publ. 12/15/1989.

Claims (3)

1. A device for discharging a gas-air mixture from a mold for thermal insulation of products by expandable curable compositions, made in the form of a cylindrical glass, the open end of which has a cylindrical protrusion on the outside, and the bottom and the cylindrical part of the glass adjacent to the bottom have through holes. 2. The device according to p. 1, in which through holes can be made in the form of slots. 3. The device according to any one of paragraphs. 1 and 2, in which the size of the through holes and the width of the slots do not exceed 2 mm

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